diff --git a/src/feature/dircommon/dir_connection_st.h b/src/feature/dircommon/dir_connection_st.h
index 2c68e61845..12230e6741 100644
--- a/src/feature/dircommon/dir_connection_st.h
+++ b/src/feature/dircommon/dir_connection_st.h
@@ -28,7 +28,9 @@ struct dir_connection_t {
   * fingerprints.
   **/
   char *requested_resource;
-  unsigned int dirconn_direct:1; /**< Is this dirconn direct, or via Tor? */
+  /** Is this dirconn direct, or via a multi-hop Tor circuit?
+   * Direct connections can use the DirPort, or BEGINDIR over the ORPort. */
+  unsigned int dirconn_direct:1;
 
   /** If we're fetching descriptors, what router purpose shall we assign
    * to them? */